INCOME TAXES (Income tax provisions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 11,900	$ 6,900	$ 4,600
Foreign	12,300	15,100	14,300
State	2,600	1,400	1,200
Total current	26,800	23,400	20,100
Deferred:
Federal	(200)	(600)	3,600
Foreign	(4,000)	(2,500)	(2,600)
State	(100)	500	(6,200)
Total deferred	(4,268)	(2,566)	(5,164)
Current payable and deferred - Income tax provisions	$ 22,540	$ 20,836	$ 14,890